Daim ntawv thov ntawm Dipropylene Glycol Monomethyl Ether hauv Waterbased Wood Coatings

Taw qhia

Lub hauv paus ntsiab lus ntawm dej-raws li ntoo txheej yog: lub ntsiab zaj duab xis-tsim tshuaj (emulsion), zaj duab xis-forming pab, wetting agents, defoaming agents thiab fillers.

Ntawm lawv, cov khoom siv ua yeeb yaj kiab kuj tseem hu ua coalescing aids, uas tuaj yeem txhawb nqa cov yas ntws thiab elastic deformation ntawm cov khoom siv latex, txhim kho lawv cov khoom coalescence, thiab pab kom lawv tsim cov yeeb yaj kiab hauv ntau hom kev tsim kho.

Kev xaiv cov khoom siv ua yeeb yaj kiab yuav tsum tau ua tib zoo saib xyuas cov hauv qab no:

(1) Cov kev pabcuam ua yeeb yaj kiab yuav tsum yog cov hnyav hnyav rau cov khoom siv polymer, uas tuaj yeem txo cov iav hloov pauv kub ntawm polymer thiab muaj kev sib raug zoo;

(2) Lub solubility hauv dej yog me me, thiab nws yog ib qho yooj yim rau adsorbed los ntawm latex hais thiab muaj kev coalescence zoo. Cov khoom siv ua yeeb yaj kiab yuav tsum tau tsom mus rau sab hauv ntawm cov khoom siv latex thiab hauv cov txheej txheem tiv thaiv ntawm cov khoom latex;

(3) Tsim nyog volatilization ceev, nyob rau hauv cov zaj duab xis tsim Ua ntej nyob rau hauv lub txheej zaj duab xis, nws volatilization tus nqi yuav tsum qis dua cov dej thiab ethanol, thiab nws yuav tsum tau volatilized tag nrho tom qab tsim zaj duab xis;

(4) Nws tsis cuam tshuam rau kev ruaj ntseg ntawm cov latex system;

(5) Nws muaj kev nyab xeeb thiab tsis muaj tshuaj lom rau tib neeg thiab tsiaj txhu.

Nyob rau hauv txoj kev tshawb no, cawv ether kuab tshuaj feem ntau siv nyob rau hauv waterborne wood coatings raug xaiv los mus ntsuam xyuas cov teebmeem ntawm ob txawv film-forming pab -CAS 34590-94-8 Dipropylene glycol monomethyl ether (DPM),dipropylene glycol butyl ether (DPnB) ntawm cov khoom siv zaj duab xis, thiab txiav txim siab qhov zoo tshaj plaws compounding tswvyim.

Cov teebmeem ntawm cov coalescents sib txawv ntawm cov khoom ua yeeb yaj kiab

Lim cov khoom siv hauv paus uas muaj {{{0}}} g acrylic emulsion, 0.5 feem pua ​​(mass feem, tib yam hauv qab no) BYK-346 thiab 0.5 feem pua ​​BYK-024 nrog ib 300-mesh lim ntaub. Nyob rau hauv cov xwm txheej nplawm, ntxiv 2 feem pua ​​​​4 feem pua ​​​​, 6 feem pua ​​, 8 feem pua ​​​​thiab 10 feem pua ​​​​ntawm kev sib koom ua ke ntawm tag nrho pawg ntawm cov kab ke.

Tom qab cov npuas dej ploj lawm, qhov viscosity ntawm cov kua txheej yog ntsuas, thiab tom qab ntawd cov zaj duab xis yog khawb (100 μm tuab) los ua ib lub phaj, thiab cov yeeb yaj kiab qhuav ntawm 50 degree rau 1 h, lub gloss thiab tsis kam ntawm cov zaj duab xis txheej. tau kuaj pom, thiab cov txiaj ntsig tau qhia hauv cov lus hauv qab no:

Kev cuam tshuam ntawm zaj duab xis-forming Additives DPM ntawm kev ua yeeb yaj kiab

Kev cuam tshuam ntawm zaj duab xis-forming Additives DPnB ntawm Kev Ua Yeeb Yam

Nws yog ib qho nyuaj rau ib coalescent los optimize qhov kev ua tau zoo ntawm waterborne wood coatings nyob rau hauv txhua yam. Yog li ntawd, kev sib xyaw ntawm coalescents yuav tsum tau txiav txim siab kom tau txais qhov zoo tshaj plaws filming nyhuv.

Kev cuam tshuam ntawm Coalescent Auxiliary Compounding Ratio ntawm Transparency ntawm Primer

Thaum cov dej-raws li acrylic emulsion, 0.5 feem pua ​​​​BYK-346 thiab 0.5 feem pua ​​BYK-024 yog siv los ua cov ntaub ntawv hauv paus, thiab tus nqi ntawm cov yeeb yaj kiab. -forming pab yog 8 feem pua ​​​​ntawm tag nrho cov huab hwm coj ntawm lub cev, qhov kev pab ua yeeb yaj kiab m(DPM):m(DPnB)= 5:3 thiab m(DPM):m(DPnB)=3 : 5 dej-raws li pob tshab primer (tsis muaj hmoov) txau 3 zaug, qhov ntau npaum li cas yog 120g / m2, thiab ziab hauv chav sov li 4 teev txhua zaus. Cov txiaj ntsig tau pom hauv qab no:

Cov lus xaus

Xav txog yam xws li kev ruaj ntseg, kev tiv thaiv ib puag ncig, tus nqi, kev ua tau zoo thiab kev tsim kho ntawm cov dej-raws li ntoo txheej, kev sib xyaw ntawm cov yeeb yaj kiab-tsim DPM thiab DPnB yog qhov kev xaiv zoo tshaj plaws nyob rau theem no, thiab qhov ntau npaum li cas thiab qhov sib piv yog txiav txim siab los ntawm cov emulsions tshwj xeeb. thiab txheej txheej tus qauv.

Qhov chaw:

Daim ntawv thov ntawm Dipropylene Glycol Methyl Ether / Dipropylene Glycol Butyl Ether hauv Waterborne Wood Coatings

NIE Chang-hong, ZONG Jia-huan, YUAN Ji-xian

(Jiangsu Yida Chemical Co., Ltd., Jiangyin 214441, Jiangsu, Suav teb)